2. Mountain biking

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Try it if you love: Cycling

Street cycling is a great exercise, but taking your game to a mountain — or a hilly trail, if a mountain’s not readily available — should raise your adrenaline levels. It’s loads of fun to explore new terrain, especially when surprises may lie around each corner. The elevation changes will keep you in top shape, and you’ll burn calories and add muscle without constantly inhaling diesel fumes from the nearest city bus.